North Korea made headlines earlier this week when it claimed it had successfully detonated a hydrogen bomb. Although experts have expressed skepticism, it's worth understanding how a hydrogen bomb works. An h-bomb is different from the atomic bombs infamously used by the U.S. against Japan in WWII. Hydrogen bombs can cause much more damage than atomic bombs. Julian goes into the details here. Be sure to watch the TestTube News video to learn more about North Korea's nuclear ambitions.

Read More:U.N. poised to act against North Korea after latest nuclear test (CNN)"The U.N. Security Council is set to implement "significant" punitive measures after North Korea's nuclear test and will begin working on a new resolution "immediately," a statement released by Security Council President Elbio Rosselli says."